hermes-agent/tests
snav e84fe483bc feat(discord): channel history backfill for multi-user sessions
Adds optional channel-context backfill for Discord shared-channel sessions
so the agent can see recent messages it missed between its own turns
(typically when require_mention=true filters out most traffic).

Previously the agent only saw the @mention message that triggered it, which
led to disorienting replies in active multi-user channels where the
conversation context was invisible. With backfill enabled, a configurable
number of recent messages are fetched per-turn and prepended to the trigger
message as a context block, kept separate from sender-prefix logic so
attribution remains clean.

This re-opens the work from #13063 (approved by @OutThisLife on 2026-04-20,
closed when I closed the branch to address the simpolism:main head-branch
issue plus an ordering bug I caught later in live use). Filing against the
freshly-rewritten problem statement in #13054 so the design is grounded in
the failure mode rather than the implementation shape.

The implementation follows the **push-mode last-self-anchored** design from
the two options laid out in #13054. See the issue for the trade-off
discussion vs pull-mode (#13120 was an earlier closed PR using that shape).
Treating this as a reference implementation — happy to rewrite as
last-trigger anchoring or as a hybrid with #13120 if maintainers prefer.

Changes:

- gateway/platforms/discord.py:
  - new `_discord_history_backfill()` / `_discord_history_backfill_limit()`
    helpers (config.extra > env > default), mirroring the existing
    `_discord_require_mention()` shape
  - new `_fetch_channel_context()` that scans `channel.history()` backwards
    from the trigger to the bot's last message (or limit), formats as
    `[Recent channel messages] / [name] msg / ...`, respects DISCORD_ALLOW_BOTS,
    skips system messages
  - per-channel `_last_self_message_id` cache to narrow the fetch window
    on hot paths (avoids full history scan when the bot has spoken recently)
  - **IMPORTANT**: passes `oldest_first=False` explicitly to `channel.history()`.
    discord.py 2.x silently flips the default to True when `after=` is supplied,
    which would select the EARLIEST N messages after our last response instead
    of the LATEST N before the trigger. In high-traffic windows this would
    return stale tool traces and drop the actual final answer the user is
    asking about. See regression test below. Caught in live use during a
    Codex tool-trace burst on May 13 2026.
- gateway/config.py: discord_history_backfill + discord_history_backfill_limit
  settings + yaml→env bridge
- gateway/platforms/base.py: channel_context field on MessageEvent
- gateway/run.py: prepend channel_context after sender-prefix so the
  [sender name] tag applies to the trigger message alone, not to the backfill
- hermes_cli/config.py: defaults for new discord.history_backfill and
  discord.history_backfill_limit keys
- cli-config.yaml.example: documented defaults
- tests/gateway/test_discord_free_response.py: 7 new tests covering
  cold-start backfill, self-message stop boundary, other-bot filtering,
  cache hot-path narrowing, stale-cache fallback, shared-channel +
  per-user backfill paths, and the ordering regression test
  (`test_fetch_channel_context_cache_uses_latest_window_when_after_set`)
- tests/gateway/test_config.py: yaml→env bridge tests
- tests/gateway/test_session.py: prefix-order edge cases
- website/docs/user-guide/messaging/discord.md: env vars + config keys +
  usage docs

Tested on Ubuntu 24.04 — empirically validated in my own multi-bot Discord
research server for the past three weeks.

Fixes #13054
Supersedes #13063 (closed)
2026-05-14 15:50:57 -07:00
..
acp fix: simplify ACP approval bridging 2026-05-13 22:59:39 -07:00
acp_adapter fix: make session search initialize session db 2026-05-09 14:36:58 -07:00
agent fix(codex-app-server): attach redacted stderr tail to generic failures (#25929) 2026-05-14 14:55:23 -07:00
cli fix(cli): clamp scrollback box widths + suppress status bar after resize (#25975) 2026-05-14 15:22:44 -07:00
cron fix(cron): avoid github skill false positives in scanner 2026-05-09 11:11:45 -07:00
e2e fix(dashboard): UI polish — modals, layout, consistency, test fixes 2026-05-12 13:59:22 -04:00
environments/benchmarks
fakes
gateway feat(discord): channel history backfill for multi-user sessions 2026-05-14 15:50:57 -07:00
hermes_cli feat(proxy): local OpenAI-compatible proxy for OAuth providers (#25969) 2026-05-14 15:40:48 -07:00
hermes_state
honcho_plugin fix(tests): exercise profile-mode HERMES_HOME for honcho fallback 2026-05-13 22:53:01 -07:00
integration
openviking_plugin
plugins fix(memory): skip OpenViking upload symlinks 2026-05-14 07:48:03 -07:00
providers feat(nous): unified client=hermes-client-v<version> tag on every Portal request (#24779) 2026-05-12 20:49:20 -07:00
run_agent Merge pull request #21012 from stephenschoettler/fix/ci-pr-check-unblock 2026-05-14 16:16:42 -04:00
skills Add unit tests for hyperliquid skill functionality 2026-05-10 22:15:04 -07:00
stress fix(kanban): gate claim + unblock on parent completion 2026-05-09 11:07:37 -07:00
tools fix(agent): keep image tool results from poisoning text-only sessions 2026-05-14 14:52:15 -07:00
tui_gateway
website
__init__.py
conftest.py test(conftest): plug every gateway-kill leak path (#23486) 2026-05-10 18:55:28 -07:00
run_interrupt_test.py
test_account_usage.py
test_atomic_replace_symlinks.py
test_base_url_hostname.py
test_batch_runner_checkpoint.py
test_cli_file_drop.py
test_cli_manual_compress.py
test_cli_skin_integration.py
test_ctx_halving_fix.py fix(cache): kill long-lived prefix layout — system prompt is now byte-static within a session (#24778) 2026-05-12 20:46:04 -07:00
test_empty_model_fallback.py
test_evidence_store.py
test_gateway_streaming_nested_config.py fix(gateway): load streaming config from nested gateway.streaming key 2026-05-14 14:51:07 -07:00
test_get_tool_definitions_cache_isolation.py
test_hermes_bootstrap.py
test_hermes_constants.py
test_hermes_home_profile_warning.py
test_hermes_logging.py
test_hermes_state.py fix(session): route OR-combined short CJK tokens to LIKE fallback (#20494) 2026-05-09 17:53:02 -07:00
test_hermes_state_wal_fallback.py
test_honcho_client_config.py
test_install_sh_browser_install.py fix(install): support non-sudo service-user installs on apt distros (#25814) 2026-05-14 09:05:31 -07:00
test_install_sh_pythonpath_sanitization.py
test_install_sh_setup_wizard_tty_probe.py
test_install_sh_symlink_stomp.py fix(install): preserve pip entry point when re-running on symlinked install 2026-05-14 07:08:45 -07:00
test_install_sh_termux_network_prereqs.py
test_ipv4_preference.py
test_lazy_session_regressions.py
test_lint_config.py
test_live_system_guard_self_test.py test(conftest): plug every gateway-kill leak path (#23486) 2026-05-10 18:55:28 -07:00
test_mcp_serve.py
test_mini_swe_runner.py
test_minimax_model_validation.py
test_minimax_oauth.py fix(minimax): harden OAuth dashboard and runtime 2026-05-11 22:15:16 -07:00
test_minisweagent_path.py
test_model_picker_scroll.py
test_model_tools.py
test_model_tools_async_bridge.py
test_ollama_num_ctx.py
test_packaging_metadata.py
test_plugin_skills.py
test_process_loop_event_loop_warning.py
test_project_metadata.py fix(install): use --extra all not --all-extras; drop lazy-covered extras from [all] (#24515) 2026-05-12 15:06:25 -07:00
test_retry_utils.py
test_sql_injection.py
test_subprocess_home_isolation.py
test_termux_all_extra_compat.py
test_timezone.py
test_toolset_distributions.py
test_toolsets.py test(toolsets): lock web search into default platform coverage 2026-05-14 08:03:33 -07:00
test_trajectory_compressor.py
test_trajectory_compressor_async.py
test_transform_llm_output_hook.py
test_transform_tool_result_hook.py
test_tui_gateway_server.py
test_utils_truthy_values.py
test_yuanbao_integration.py
test_yuanbao_markdown.py
test_yuanbao_pipeline.py
test_yuanbao_proto.py